Hoisting drum



Jan- 2 1952 J. P. HARKRADER HOISTING DRUM 2 SHEETS-SHEET 2 I Filed Nov.28, 1950 Patented Jan. 29, 1952 UNITED sures lHOIS'I-I G DRUM John I.Harkrader, ltu nson, N J.

Application November 28, 19.50, Serial "No. 197,891

The invention relates to hoisting drums such heated it pow r nche Intheord nar hoisting winch con tr ction n epeni is i fo m d one. end f hedrum ha ie. th e d. o posite the gear easing tor rec iving me ns for anhorin the nd of t e cable to the drum orfor dead-ending the fall of thecable as it is called. lhis is a difficult operation and adjustment ofthe cable for length is also difiicult. 1

Thi practice a s n essi s p viding i ht and l f h n in h s wi h ri tnd'left ha drums, respectively, which complicates the construction andmakes it costly.

Itis a prime object of the present invention to eliminat he a oresaidimeul ies and isadantages t is anothe je of th p sent invention toprovide means for securing a cable to a hoist.- ng dr m y hic t e a h re ipat the end. of 2" he cabl may be a d thr ug an op n n in the drumand securely locked in place,

Another object of the invention is to provide means or anc ring t e d.of a cable to a drum that is convenient and readily removable to permitadjustment of the cable.

Another object of the invention is to provide an opening at each end ofthe drum with a ur e n nce t e h ep n n whereby all h p P nts m y b a oded in the cable and wher k nkin e th a e is. imp si le An ther ob ect ohe nve ion s n H ovide ne ns for cl s ng h open ng in the drum that isreadily removed and does not interfere with h c li g o the cab e on thed um 30 Another object. of the invention is to provide mean e anchor g aa l to a h istin d um at issirn le and rugged in. st cture i exnen'...,et manufacture and. efieetive in use.

The ve i broadly onsist fo min hole anda cornmunicating groove at eachend of the drum so that a cable or wire fall with an anchoring clip canbe inserted in the desired end of the drum E eh ele plu ged, to prevenwithdrawal of the cable and clip, This per.-.. mits the use or one drumfor both hands.

Other objects and advantages of the invention will be apparent from thedescription thereog to ellow taken in. connection with. theaccernnanyns-drawing in 2 V Fi ure ie. 21. frag. side view f; aconstruction. wi h a hois in drum mbodyin my inven i n, parts beingshown. broken away Fi ure 2 is an end view of the dru Figure 3 is a.vertical sectional view taken, eh 55 the. plane. of the line. 3:3otE-ieure 2.

3 Claims. (Cl. 242-1117) 2 a Figure 4-lsa fragmentary vertical sectionalview taken on the plane of the line 4+4 of' Figure 2. u

Figure 5 is a horizontal sectional view on the plane of the line 5-5'ofFigure 2;

Figure 6 is a vertical sectional view takenon the plane of the line 66of Figure 3.

Figure 7 is a vertical sectional view taken on the plane of the lineT-lof Figure 3. 1

Figure 8 is a bottom plan View of the'drum taken from the line 81 -8 ofFigure 2 and looking in the direction of the arrows.- Figure 9 is aperspective view of the closure plate.

In Figure 1, a power" winch I is shown with a drive shaft 2 adapted tobe connected to a suitable source of power such as anelectric motor (notshown). Enclosed in a housing 3 supported on the framework of the winchis a hoisting drum 4, The drum is rotatably mounted on a shaft 5 whichis mounted between the end walls 6 of the housing; 'A gear 1 fixed toone end of the drum and operatively connected by a suitable gearing unitto the drive shaft 2 serves to rotatethe drum, A brake drum 8 is shownon one end ofthe shaft 2.

The hoisting drum 4 comprises a hollow cylindrical metal body 9 closedat its ends by walls l0 and H. Each end wall is formed with a hubbearing portion l2 having a central opening 13 for the shaft 5. Beyondthe end-wall H, the body of-the drum is formed with an extension It. Theextension terminates in an outwardly projecting flange l5, The hubbearing portions are strengthened by webs l6. End wall I!) is providedwith spaced screw threaded openings I? for receiving fastening membersfor securin the gear I to the drum. The opposite end wall" H isprovidedwith plugs or discs 18 for closing openings in the wall, I

The surface of the hoisting drum is formed with the usual helical grooveI9 for the reception of the convolutions of the wire rope or cable 20'of the drum. My invention is concerned with means for anchoring the endof the wire rope or cable to either end-of the druin.

For anchoring the cable to the right hand end ofthe drum as viewedin-Figures 1 and'8, the'cylindr-ical extension M of the drum body isdeformed or depressed adjacent the bottom as viewed in Figures 2 and 6and merges into' a flattened portion 2%. This reduces the. diamv eter ofthe wall portionof the extension but en. larges the flange portionthereof to form a wall 21 parallel to th adjacent end wall H, but spa edthereirorn terrevitiev a radial. passage taken I extension I4 isflattened at this point to provide a horizontal wall 21 across the spacebetween the inner end wall It and the wall 22. The horizontal wall 21 isbelow the flattened portion 2| of the extension thereby leaving anopening between said flattened portion and the wall 21, and forming aradial shoulder 28 on the wall II. The wall 21 extends from the end ofthe wall 22 to the flange l5 at the base of the vertical wall 25. Theend wall ll, vertical walls 24 and 25 and horizontal walls 26 and 21form a compartment or recess 29 opening laterally, the horizontal wall21 being formed with a screw threaded opening 30 to provide an entranceto the compartment or recess. The opening 301s closed by a plug 3|.

When the wire rope or cable 20 is to be attached to the hoisting drum 4,the cable is wrapped around the extension l4 of the drum and its endthreaded'through the passage 23 between the walls I I and 22, over theflattened por tion 21 of the extension, through the opening between theend of the flattened portion 2| and the horizontal wall 21, into thecompartment 29. An anchoring clip or device is inserted through thelateral opening or through the bottom opening 30 into the compartment29. The anchoring device comprises a pair of complementary clampingplate members 32 and 33 having opposed grooves 34 and 35, respectively.Plate 32 is formed with a downwardly extending screw threaded post 36extending through an opening 31; in the adjacent end of the plate 33.Plate 33 is formed with an upstanding screw threaded post 38 extendingthrough an opening 39 formed in the adjacent end of the plate 32. Theend of the cable is folded upon itself to form a loop 40 and the foldedportions placed between the clamping plates 32 and 33 in the grooves 34and 35. Lock nuts 4| on the posts 36 and 38 hold the end of the cableclamped in the .grooves between the plates. The anchoring device issmaller than the opening 30 in wall 21 but larger than'the openingbetween the end of the flattened portion 4| and the horizontal wall 21and also larger than the passage 23.. When pressure is exerted upon thecable, the anchor ing plates 32 and 33 with the cable end clampedthereto will be pulled to their final position in the compartment 29,abutting against the extension 24 and shoulder 28, thereby securelyanchoring the cable to the drum. The plug 3|.

prevents the anchoring plates and cable from falling out of the.compartment radially upon slackening of the cable, and a plate 42removably secured to the flange l5 and wall 22 by bolts 43 may beprovided to prevent said parts from. falling laterally out of thecompartment.

Provision is also made for anchoring the end of the cable on the lefthand end of the drum as viewed in Figures 8 and 1. For this purpose, thewall of the body 9 of the drum, as shown in Figure 7, is deformed toprovide a circumferential groove or passage 44 having flat vertical sidewalls 45 and a horizontal wall 46 connecting the inner edges of the sidewalls. inner wall 43 at its inner end, at the deepest point of thegroove 44, is shaped to provide a substantially square shapedcompartment or recess 41 extending inwardly of the drum. A horizontalwall 48 extends across the side walls 45 at the outer end of thecompartment 41, leaving an opening between the wall 46 and the wall 48and providing shoulders 49 on the inner ends of the side walls 45. Thehorizontal wall 48 is formed with a screw threaded opening 50 which isadapted to be closed by a plug 51.

As in the form of the invention in Figures 2 and 6, the cable 20 isthreaded through the groove 44 and through the opening between the walls46 and 48 into the compartment or recess 41 and its end is securedtherein by the anchoring clip or device, the plates 32 and 33 of saiddevice abutting against the shoulders 49 of the side walls 45 andagainst the adjacent wall of the compartment.

It will thus be seen that the cable 20 may be very conveniently anchoredeither at the right hand'side of the drum or at the left hand side.

Furthermore, the anchoring clip 32, 33 can be easily and quicklyadjusted along the cable, or the cable can be inserted through the clipto vary the length of the cable as desired.

Changes in details of construction might be made without departing fromthe principle of the inventionand it is desired to be limited only bythe appended claims and the state of the prior art.

What I claim is:

1. A hoist drum comprising a hollow cylindrical body having an interiorwall forming a radial shoulder, the peripheral wall of the drum having acircumferential groove which opens through said interior wall to nicelyreceive the end portion of a cable, and said peripheral wall of the drumalso having an opening permitting free passage of an anchoring device onsuch a cable into abutment with said radial shoulder, and a plugremovably secured in said opening to overlie said cable end portion andsaid anchoring device so as to hold them against disconnection from thedrum through said groove and opening.

2. A hoist drum as defined in claim 1 wherein said interior wall forms apart of a chamber closed except for said groove and said opening, in

which said anchoring device is located so that movement of the anchoringdevice and the corresponding end of the cable relative to the drum islimited in all directions.

3. In combination the hoist drum as defined in claim 1, a hoisting cablehaving an end portion in said groove, and an anchoring device connectedto said end portion of the cable and ad-" justable longitudinallythereof and in abutting relation to said radial shoulder.

JOHN P. HARKRADEl-t.

REFERENCES CITED The following references are of record in the Thehorizontal

